From df623d13cc3b7e3ee5f4688c1847989605773e1a Mon Sep 17 00:00:00 2001
From: kageru <kageru@encode.moe>
Date: Wed, 4 Dec 2019 22:27:27 +0100
Subject: [PATCH] D4P2: fold result

---
 2019/04/src/main.rs | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/2019/04/src/main.rs b/2019/04/src/main.rs
index eccf924..2c7bd5d 100644
--- a/2019/04/src/main.rs
+++ b/2019/04/src/main.rs
@@ -12,11 +12,7 @@ pub fn main() {
         vec.iter()
             .group_by(move |n| *n)
             .into_iter()
-            .filter_map(|(_, v)| if v.count() == 2 { Some(true) } else { None })
-            // can’t do this because I’m too smol brained for the borrow checker
-            //.filter(|(_, v)| v.count() == 2)
-            .count()
-            > 0
+            .fold(false, |acc, (_, v)| acc || v.count() == 2)
     });
     println!("Part 2: {}", part2.count());
 }